Shifali,

7K160 (Kintex-7) has 162k logic cells & 600 DSP slices.

KU3P (Kintex UltraScale+) has 356k logic cells & 1,368 DSP slices.

We recommend using TPS650861 for powering KU3P, so logically it seems to me that TPS650861 can also power 7K160.

You can order BOOSTXL-TPS650861 and samples of the PMIC to program the device and test the performance for your application.

Shifali,

Based on your XPE file, it appears to me that you now have 3 choices, and the correct answer would depend on: (a) the input voltage, (b) the rest of the system, and (c) whether you prefer programming a PMIC or setting output voltages manually.

• TPS650861 - If the input voltage is in the range of 5.6V-21V and the rest of the system is complex, the TPS650861 is still a good choice. You can use DCDC1 to generate 3.6V from the higher input voltage supply and use BUCK3/4/5 to generate the VCCINT, MGTAVCC, MGTAVTT rails and LDOs to generate the rest of the rails. DCDC2, BUCK6, and VTTLDO would be un-used, but it would still be a very cost-effective design.
• TPS6521815 - If the input voltage is 5V and the rest of the system is relatively simple, the TPS6521815 is a great choice and can be programmed using the BOOSTXL-TPS6521815 board.
• TPS65023 - If you want to perform sequencing manually and set the output voltage using external resistor dividers, this is still a good choice. Programming a PMIC like the TPS6521815 or TPS650861 (User-programmable DIY PMICs) requires some additional investment in time to get started

For example, here is a power tree using TPS6521815:

*3.3V supply can be the input to all the LDOs to improve efficiency and may also be required to power peripheral ICs, which will add to current consumption for this rail.

TPS65023 can be used in a similar way (DCDC1-3 supply the same rails), but LDO1 would supply 200mA at 1.8V for MGTVCCAUX,VCCADC and LDO2 would supply 200mA at 3.3V for VCCO 3.3V because the DEFLDO1/2 pins only allow 4 options for LDO1/2 output voltages and 1.8V/3.3V is almost always the best choice. With the TPS65023, you would need to supply VCCAUX with an external regulator.

Let me know what you think about these options.

Shifali N said:

Case 1: Using TPS650861 in my design.

I will be only using 3 step down convertors and 3 LDOs. And not use controllers and load switch. Can i leave pins open/ floating.

Please refer to TPS65086x Schematic and Layout Checklist (Rev. A)

Shifali N said:

Case 2: Using TPS6521815 in my design.

I wil,be using DCDC1 to DCDC4 and 1 LDO. I will not use DCDC5 ,DCDC6 and load switches. Can i leave pins open/ floating.

Please refer to TPS6521815 datasheet, page 93, section 6.1.2 Applications Without Battery Backup Supplies

Shifali,

TPS65912 is an OTP-based, factory-programmed PMIC. There are a few variants of this device (TPS659121, TPS659122, TPS659127), but if they do not match your design exactly for voltages and sequencing then they will not work and this PMIC cannot be re-programmed.

What motivated you to select this device? It sounds like overkill for your system with the PMIC having 4 DC-DCs & 10 LDOs.

Shifali,

Please look at TPS65261-1 PMIC device. This will meet your requirements.